A blue ball is thrown upward with an initial speed of 21.4 m/s, from a height of 0.9 meters above the ground. 2.6 seconds after the blue ball is thrown, a red ball is thrown down with an initial speed of 9.4 m/s from a height of 25.3 meters above the ground. The force of gravity due to the earth results in the balls each having a constant downward acceleration of 9.81 m/s2. 1. How long does it take the blue ball to reach its maximum height?
2. What is the maximum height the blue ball reaches?
3. What is the height of the red ball 3.38 seconds after the blue ball is thrown?
4. How long after the blue ball is thrown are the two balls in the air at the same height?
5. Which plot correctly shows the velocity of the two balls as a function of time?

dù mǎ cháng rǎn sè háo kè bǎng tǎ tè tī nǐ helo ke bang help u want?

Explanation:

0.9 meters above the ground. 2.6 seconds after the blue ball is thrown, a red ball is thrown down with an initial speed of 9.4 m/s from a height of 25.3 meters above the ground.

dù mǎ cháng rǎn sè háelo

i think its c if i'm wrong

note: the given question is incomplete.

complete question is given below.

which is an example of kinetic energy?

a. the energy stored in ethanol  

b. a hockey puck sliding across the ice  

c. a compressed spring  

d. a ball sitting at the top of a ramp

solution: the kinetic energy is the energy posses by the virtue of the motion of the object.

in the given options, a, c and d are the example of potential energy because it is the energy posses by the virtue of the rest of the object. but option b has the kinetic energy as the object is in motion.

hence, a hockey puck sliding across the ice   is the apex example of kinetic energy.

so, the option (b) a hockey puck sliding across the ice   is the correct option.